CN113293822A - Control system and method of non-negative-pressure water supply equipment - Google Patents
Control system and method of non-negative-pressure water supply equipment Download PDFInfo
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- CN113293822A CN113293822A CN202010669306.1A CN202010669306A CN113293822A CN 113293822 A CN113293822 A CN 113293822A CN 202010669306 A CN202010669306 A CN 202010669306A CN 113293822 A CN113293822 A CN 113293822A
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
- E03B11/10—Arrangements or adaptations of tanks for water supply for public or like main water supply
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B1/00—Methods or layout of installations for water supply
- E03B1/02—Methods or layout of installations for water supply for public or like main supply for industrial use
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/072—Arrangement of flowmeters
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/075—Arrangement of devices for control of pressure or flow rate
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/078—Combined units with different devices; Arrangement of different devices with respect to each other
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/09—Component parts or accessories
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- Structural Engineering (AREA)
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a control system and a method of non-negative pressure water supply equipment, wherein the system comprises: the system comprises a water inlet pressure sensor, an electric valve, a flow meter, a first water pump and a water supply controller; the water supply controller is respectively connected with the water inlet pressure sensor, the electric valve and the first water pump; the water supply controller is used for receiving a pressure signal of the water inlet pressure sensor and a flow signal of the flowmeter, and when a pressure signal value of the water inlet pressure sensor is larger than a preset first pressure value and a flow signal value of the flowmeter is larger than a preset first flow value, the water supply controller controls the electric valve to open and control the first water pump to start, and controls the opening degree of the electric valve to be in positive correlation change along with the signal value of the water inlet pressure sensor. The realization is avoided influencing user's water because first water pump frequently opens and stops to can prolong the life of first water pump.
Description
Technical Field
The invention relates to a control system and a control method of non-negative-pressure water supply equipment.
Background
With the wide use of non-negative pressure water supply equipment, tap water companies in various regions put higher demands on the application of the non-negative pressure water supply equipment. In order to ensure the constant pressure of a municipal tap water pipe network and prevent users from excessively fetching water, the water consumption of other users on the same pipe network is influenced, when the equipment normally works, a limit value is set for the pressure at a water inlet of the equipment, in the whole operation process of the equipment, the pressure at the water inlet cannot be smaller than the limit value, when the water consumption of the users is reduced, once the pressure at the water inlet is smaller than the limit value, the non-negative-pressure water supply equipment is shut down, but when the users reuse water, the pressure at the water inlet is higher than the limit value, the non-negative-pressure water supply equipment is restarted, so that if the water consumption of the users is unstable, the water pump of the non-negative-pressure water supply equipment is frequently started and stopped, and the water consumption of the users is influenced.
Disclosure of Invention
In view of the above technical drawbacks and technical disadvantages of the prior art, embodiments of the present invention provide a control system of a non-negative pressure water supply apparatus and a method thereof, which overcome or at least partially solve the above problems.
As an aspect of an embodiment of the present invention, there is provided a control system of a non-negative pressure water supply apparatus, including: the system comprises a water inlet pressure sensor, an electric valve, a flow meter, a first water pump and a water supply controller;
the water supply controller is respectively connected with the water inlet pressure sensor, the electric valve and the first water pump;
the water supply controller is used for receiving a pressure signal of the water inlet pressure sensor and a flow signal of the flowmeter, and when a pressure signal value of the water inlet pressure sensor is larger than a preset first pressure value and a flow signal value of the flowmeter is larger than a preset first flow value, the water supply controller controls the electric valve to open and control the first water pump to start, and controls the opening degree of the electric valve to be in positive correlation change along with the signal value of the water inlet pressure sensor.
In one embodiment, the control system of the non-negative pressure water supply equipment further comprises a frequency converter respectively connected with the water supply controller and the first water pump;
the water supply controller is specifically used for controlling the electric valve to achieve the maximum opening degree and controlling the frequency converter to work in a frequency conversion mode when the pressure signal value of the water inlet pressure sensor is larger than a preset first pressure value and the flow signal value of the flow meter is larger than a preset first flow value, so that the water supply pressure value of the first water pump during working reaches a preset second pressure value; the preset first pressure value is smaller than the preset second pressure value.
In one embodiment, the water supply controller is further configured to control the opening degree of the electric valve to change in a positive correlation manner along with the change of the pressure signal value of the water inlet pressure sensor when the pressure signal value of the water inlet pressure sensor is smaller than a preset third pressure value; the preset third pressure value is smaller than the preset first pressure value.
In one embodiment, the control system of the non-negative pressure water supply apparatus further includes: a water outlet pressure sensor;
and the water supply controller is also used for controlling the running frequency of the frequency converter to be in negative correlation change along with the change of the pressure signal of the water outlet pressure sensor when the pressure signal value of the water outlet pressure sensor is received to be larger than a preset second pressure value or the pressure signal value of the water outlet pressure sensor is smaller than the preset second pressure value, so that the water supply pressure value of the first water pump during working is kept at the preset second pressure value.
In one embodiment, the control system of the non-negative pressure water supply equipment, the water supply controller is further configured to control the opening degree of the electric valve to change in positive correlation with a change in a pressure signal value of the effluent pressure sensor when the pressure signal value received from the effluent pressure sensor is greater than a preset second pressure value.
In one embodiment, the control system of the non-negative pressure water supply equipment further comprises a second water pump; the water supply controller is further used for controlling the first water pump to stop working and controlling the second water pump to start working when the flow value received from the flowmeter is smaller than a preset second flow value; the rated power of the second water pump is smaller than that of the first water pump; the preset second flow value is smaller than the preset first flow value.
In one embodiment, the water supply controller is further configured to control the second water pump to stop operating when the flow value received from the flow meter is larger than a preset second flow value.
In one embodiment, the control system of the non-negative-pressure water supply equipment further comprises a stabilizing regulator and a high-pressure energy storage cavity in the stabilizing regulator;
the water supply controller is also used for controlling the high-pressure energy storage cavity to release pressure outwards when the flow value of the flowmeter is smaller than a preset third flow value; the preset third flow value is smaller than the preset second flow value.
As another aspect of the embodiment of the present invention, a control method of a non-negative pressure water supply apparatus is provided, including:
receiving a pressure signal of a water inlet pressure sensor and a flow signal of a flowmeter;
when the pressure signal value of the water inlet pressure sensor is greater than a preset first pressure value and the flow signal value of the flow meter is greater than a preset first flow value, the electric valve and the first water pump are controlled to start, and the opening degree of the electric valve is controlled to be in positive correlation change along with the signal value of the water inlet pressure sensor.
As a third aspect of the embodiment of the present invention, it relates to a computer-readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the control method of the above-described non-negative pressure water supply apparatus.
As an aspect of an embodiment of the present invention, it relates to a water supply control apparatus, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the control method of the non-negative pressure water supply apparatus when executing the program.
The embodiment of the invention at least realizes the following technical effects:
according to the embodiment of the invention, the opening degree of the electric valve is positively changed along with the signal value of the water inlet pressure sensor by detecting the pressure signal of the water inlet pressure sensor, when the water supply flow is increased, the water inlet pressure is increased, the opening degree of the electric valve is increased, when the water supply flow is decreased, the water inlet pressure is decreased, the opening degree of the electric valve is decreased, the water inlet pressure can be adjusted to be kept stable, the first water pump of the non-negative-pressure water supply equipment is prevented from being started and stopped frequently, the water consumption of a user is prevented from being influenced by the frequent starting and stopping of the first water pump, and the service life of the first water pump can be prolonged.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of a non-negative pressure water supply device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a process of determining a maximum water supply flow rate of the second water pump according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
The first embodiment is as follows:
the embodiment of the invention provides a control system of non-negative pressure water supply equipment, which comprises: a water inlet pressure sensor 4, an electric valve 15, a flow meter 3, a first water pump 9 and a water supply controller 163;
the water supply controller 163 is respectively connected with the water inlet pressure sensor 4, the electric valve 15 and the first water pump 9;
the water supply controller 163 is configured to receive the pressure signal of the water inlet pressure sensor 4 and the flow signal of the flow meter 3, and when the pressure signal value of the water inlet pressure sensor 4 is greater than the preset first pressure value and the flow signal value of the flow meter 3 is greater than the preset first flow value, control the electric valve 15 to open and control the first water pump 9 to start, and control the opening degree of the electric valve 15 to be changed in a positive correlation with the signal value of the water inlet pressure sensor 4.
In one embodiment, referring to fig. 1, the control system of the non-negative pressure water supply equipment provided by the invention is applied to the non-negative pressure water supply equipment.
The non-negative pressure water supply equipment comprises a steady flow regulator 6, wherein a water inlet valve 1, a filter 2, the flowmeter 3 and a water inlet pressure sensor 4 are sequentially arranged at the water inlet end of the steady flow regulator 6.
The water outlet end of the flow stabilizer 6 is connected with a water inlet main pipe 7, the water inlet main pipe 7 is provided with three branches, the middle branch is connected with a bypass pipe, and when power is off, the bypass pipe can supply water to a user; the other two branches of the water inlet manifold 7 are respectively connected with a first valve 8, a first water pump 9, a check valve 10 and a second valve 11; the water outlet ends of the three branches of the water inlet main pipe 7 are connected with the corresponding branch pipes of the water outlet main pipe 12 of the non-negative pressure water supply equipment in parallel.
An overpressure protector 13 is arranged on the water outlet main pipe 12 and used for giving an alarm and stopping the operation of equipment when overpressure occurs.
The water outlet pressure sensor 14 is installed on the water outlet main pipe 12 and used for detecting the pressure in the water outlet main pipe 12 and realizing constant-pressure water supply.
The electric valve 15 is installed on the water outlet main pipe 12, and the user can be ensured not to excessively take water by controlling the opening degree of the electric valve 15.
The control cabinet 16 of the non-negative pressure water supply device is provided with a frequency converter 161, a frequency converter 162 and the water supply controller 163, the water supply controller 163 can be a Programmable Logic Controller (PLC), and the at least one frequency converter 161 and the frequency converter 162 are respectively connected with a first water pump 9.
The water inlet pressure sensor 4, the water outlet pressure sensor 14, the flow meter 3, the frequency converter 161, the frequency converter 162, and the electric valve 15 are electrically connected to the water supply controller 163.
The protection pressure of the water inlet pressure sensor 4 is preset and set according to the requirement of a tap water company before the non-negative pressure water supply device is put into use, the water inlet pressure of the first water pump 9 of the non-negative pressure water supply device during starting work is larger than the protection pressure of the water inlet pressure sensor 4, the water supply pressure of the first water pump 9 during normal work is also larger than the protection pressure of the water inlet pressure sensor 4, and the water supply pressure of the first water pump 9 during normal work is larger than the water inlet pressure during starting work (assuming that the water supply pressure during normal work is pb and the water inlet pressure during starting work is pa, pb > pa), wherein the water supply pressure of the first water pump 9 during normal work can be detected through the water outlet pressure sensor 14 installed on the water outlet main pipe 12.
Assuming that the water inlet pressure when the first water pump 9 of the non-negative pressure water supply device is started to operate is a preset first pressure signal value Pa, the water supply pressure when the first water pump is normally operated is a preset second pressure signal value Pb, and the protection pressure of the water inlet pressure sensor 4 is a preset third pressure signal value Pc (herein, the unit of all water supply pressures is MPa), the preset second pressure signal value Pb is greater than the preset first pressure signal value Pa, and the preset first pressure signal value Pa is greater than the preset third pressure signal value Pc (i.e., Pb > Pa > Pc).
After the non-negative pressure water supply equipment is put into use, the water inlet pressure sensor 4 detects a pressure signal of a water inlet end of the regulator 6 and sends the pressure signal to the water supply controller 163, the flowmeter 3 detects a flow signal of the water inlet end of the regulator 6 and sends the flow signal to the water supply controller 163, and when the water supply controller 163 detects that a pressure signal value of the water inlet pressure sensor 4 is greater than a preset first pressure value and a flow signal value of the flowmeter 3 is greater than a preset first flow value, the electric valve 15 is controlled to be opened, and the first water pump 9 is controlled to be started through the frequency converter.
In an embodiment, the water supply controller 163 may control the electric valve 15 to be opened to the maximum extent at the moment of starting the non-negative pressure water supply device to be put into use, and control the frequency converter to operate at a variable frequency, so that the water supply pressure value when the first water pump 9 operates reaches a preset second pressure value, thereby realizing constant pressure water supply to a user at the water outlet end.
When the first water pump 9 enters a normal operating state, the water inlet pressure sensor 4 continuously detects a pressure signal of the water inlet end of the regulator 6 and sends the pressure signal to the water supply controller 163, and when the water supply controller 163 receives that the pressure signal value of the water inlet pressure sensor 4 is smaller than a preset third pressure value, the opening degree of the electric valve 15 is controlled to be in positive correlation change along with the change of the pressure signal value of the water inlet pressure sensor 4, that is, the opening degree of the electric valve 15 is reduced along with the reduction of the water inlet pressure, and the opening degree of the electric valve 15 is increased along with the increase of the water inlet pressure.
Meanwhile, after the first water pump 9 enters a normal operating state, the effluent pressure sensor 14 continuously detects a pressure signal of the effluent main pipe 12 and sends the pressure signal to the water supply controller 163, and when the water supply controller 163 receives that the pressure signal value of the effluent pressure sensor 14 is greater than a preset second pressure value or the pressure signal value of the effluent pressure sensor 14 is less than the preset second pressure value, the operation frequency of the frequency converter 161 or the frequency converter 162 is controlled to be changed in a negative correlation manner along with the change of the pressure signal of the effluent pressure sensor 14, so that the water supply pressure value when the first water pump 9 operates is maintained at the preset second pressure value. Further, while the operating frequency of the inverter 161 or the inverter 162 is adjusted to change the operating frequency of the first water pump 9, when the water supply controller 163 receives that the pressure signal value of the effluent pressure sensor 14 is greater than the preset second pressure value, the water supply pressure may be feedback-adjusted by controlling the opening degree of the electric valve 15 to change in a positive correlation with the change of the pressure signal value of the effluent pressure sensor 14, so that the water supply pressure value at the time of operating the first water pump 9 is maintained at the preset second pressure value.
During the normal operation of the first water pump 9, the flow meter 3 also continuously detects the flow signal at the water inlet end of the regulator 6, and when the water supply controller 163 receives that the flow value of the flow meter 3 is smaller than the preset second flow value, it indicates that the water consumption of the user at the water outlet end is too low, and at this time, the water supply controller 163 controls the first water pump 9 to stop operating.
The inventor of the invention finds in practice that in the aspect of energy saving of water supply equipment, a water pump in the existing non-negative-pressure water supply equipment is configured according to the maximum water consumption of all users at a water outlet end, the rated flow of the water pump is far larger than the water consumption of a single user or a small number of users, so that when the water pump works, although the pressure of a municipal tap water pipe network can be fully utilized, when the user does not use water or the water consumption of the user is very small, the water pump still cannot stop working in order to maintain the pressure of the pipe network supplying water to the user, and at the moment, the water pump runs in a low-efficiency section, thereby causing great waste of electric energy.
In the prior art, an air cavity is arranged in a non-negative-pressure water supply device to store high-pressure water, the pressure of the water stored in the air cavity reaches certain pressure through the pressure of high-pressure gas, but the air cavity is limited by the structure and cannot be made large, the high-pressure gas in a high-pressure state is very soluble in water, the air cavity is changed into a water cavity after a long time, the water storage-release capacity is lost, and the water supply capacity is lost.
Still provide one kind among the prior art and set up the atmospheric pressure jar in no negative pressure water supply equipment, when user's water consumption is less, through atmospheric pressure jar release pressure, make no negative pressure water supply equipment be in the atmospheric pressure water supply state, need store a certain amount of water in the atmospheric pressure jar in order to adjust the water supply flow, but because the flow that the atmospheric pressure supplied water and the flow of water pump mismatch, the flow of water pump is greater than user's required actual user flow this moment far away, it is more frequent to cause opening and shutting of water pump, and the pressure value of the pump stopping point of water pump will be far away from the required actual pressure value of water supply, therefore, both caused the waste of energy, also threatened and harm to user's safe handling of water appliances.
In order to solve the above problems of energy waste and influence on the safe use of water using appliances caused by the fact that the water pump cannot stop working or needs to be frequently started and stopped when the water consumption of a user is very small, referring to fig. 1, the non-negative pressure water supply device in the embodiment of the present invention further includes a second water pump 5 and a high-pressure energy storage cavity 61. The second water pump 5 is installed in the steady flow regulator 6, the water outlet end of the second water pump is connected with the water outlet main pipe 12, and when the water supply controller 163 receives that the flow value of the flow meter 3 is smaller than a preset second flow value, the water supply controller 163 controls the second water pump 5 to start up, so that the second water pump 5 supplies water to a user pipe network. The rated power of the second water pump 5 is smaller than the rated power of the first water pump 9, so that the water supply capacity of the second water pump 5 can be much smaller than that of the first water pump 9 during actual use, and the second water pump 5 can supply water at a small flow rate when the water consumption of a user is small.
In the embodiment of the present invention, the second flow rate value may be automatically set every day according to the flow rate value of the user when the water consumption is low. For example, the flow meter 3 may collect the small flow rate value measured on the previous 10 days (or other values) of the non-negative pressure water supply apparatus as a basis, and the small flow rate value on the previous day is taken as a weight (or other suitable weight value) of 50%, and the second flow rate value when the second water pump 5 is operated on that day is determined. When the flowmeter 3 detects that the water using flow is less than or equal to the second flow value, the water supply controller 163 controls the second water pump 5 to start, and because the flow selection of the second water pump 5 is very close to the water supply flow actually required by the user at the moment, the second water pump 5 can be operated in a high-efficiency zone in a variable frequency mode all the time, the energy-saving effect is remarkable, and because the pressure value of the pump stopping point of the second water pump 5 is smaller, the use safety of the water using appliance of the user is ensured.
The determination of the second flow value is illustrated by a specific example below:
first, a small flow rate set value qs representing the second flow rate value is determined, and then the rated flow rate of the second water pump, which has a rated flow rate QX greater than the small flow rate set value qs, is determined according to the small flow rate set value qs, and for example, QX may be 1.2qs or QX may be 1.5 qs.
The small flow setting for the current day is determined as 50% of the previous day weight below, where X in the following equation represents the adjustment factor:
the second flow value in the embodiment of the present invention may be updated at an appropriate time of day, for example, 6 o 'clock earlier or 6 o' clock later each day. On the first day when the non-negative pressure water supply equipment is put into operation, a small flow set value qs can be set in advance according to experience, and if the small flow time period measured on the day is the maximum, the flow is q 0. The non-negative pressure water supply equipment is put into operation for the first day with the small flow set value qs being q 0.
During the second water pump operation on the first day, the maximum water supply flow rate q1 of the second water pump on the first day when the non-negative pressure water supply equipment is put into operation is obtained as shown in fig. 2.
As shown in fig. 2, the time period for determining the maximum water supply flow rate of the second water pump may be from 11 pm to 5 pm, specifically, the implementation process of fig. 2 may be implemented in the water supply controller 163, after the non-negative pressure water supply apparatus is turned on, the water supply controller 163 determines whether the time is the time of day 23, and if the time has not entered the time of day 23, the latter step is not performed, and if so, the maximum water supply amount of the second water pump 5 on the day is first set to qmax equal to 0, reading the accumulated flow qi of each 1-hour time period at an interval of one hour, judging whether qi-qmax is greater than 0, if so, assigning the value qmax of the maximum water supply flow of the second water pump 5 to qi, circularly executing the steps of judging and assigning, judging whether the time is the next morning 5, if so, and outputting and storing the value qmax of the maximum water supply flow of the second water pump 5.
Then, when the second flow rate value QX on day 2 is determined, the small flow rate set value qs of the supply water flow rate of the second water pump 5 is: q0 × 1/2+ q1 × 1/2. And the maximum supply water flow rate qmax of the second water pump 5 on day 2 is obtained again as q2 according to the implementation flow described above with reference to fig. 2.
When determining the second flow rate value QX on day 3, first, the adjustment factor X is determined to be (q0+ q1)/q2, and the small flow rate set value qs of the supply water flow rate of the second flow rate pump is: (q0+ q1)/X/2+ q 2/2. And the value qmax of the maximum water supply flow rate of the second water pump 5 on the 3 rd day is obtained again as q3 according to the implementation flow described above with reference to fig. 2.
In the same manner, when the second flow rate value Qx at the nth day is determined, where n is equal to or greater than 4 and the adjustment factor X is (q (n-11) + … + q (n-2))/qn-1, the small flow rate set value qs of the supply water flow rate of the second water pump 5 is: (q (n-11) + … + q (n-2))/X/2+ q (n-1)/2, and the value qmax ═ qn of the maximum water supply flow rate of the second water pump on the nth day can be obtained according to the implementation procedure described above with respect to fig. 2.
Of course, in the embodiment of the present invention, the mode of taking the maximum water supply flow of the second water pump 5 in the mode shown in fig. 2 is only an example, and other modes in the prior art may also be adopted to determine the maximum water supply flow of the second water pump 5 in one day.
In a specific embodiment, the first flow value may be updated at a suitable time of day, and of course, the first flow value and the second flow value may be updated simultaneously, the second flow value may be determined first, and then the first flow value may be determined, and the size of the first flow value may be 1.2 to 1.5 times of the second flow value. Thus, when the amount of the tap water is smaller than the second flow value, the second water pump 5 is started to operate, the non-negative pressure water supply equipment enters a low-flow water supply state, the second water pump 5 supplies water to the user pipe network, and when the flow reaches the first flow value and the second water pump 5 cannot maintain the set constant pressure value, the water supply controller 163 controls the second water pump 5 to stop operating and controls the first water pump 9 to start to operate. Thus, the circulation is repeated until the electric valve 15 reaches the maximum opening degree or the electric valve 15 is completely closed, and when the electric valve 15 reaches the maximum opening degree, the first water pump 9 works to supply water; when the electric valve 15 is completely closed, the first water pump 9 and the second water pump 5 stop operating.
In the embodiment of the invention, when the flow of the inlet water at the water inlet end of the regulator 6 cannot meet the water supply flow of the first water pump 9 of the non-negative pressure water supply equipment, the water in the regulator 6 can still be normally supplied as a supplementary water source, so that the tap water pipe network cannot generate negative pressure.
In the embodiment of the invention, when the first water pump 9 and the second water pump 5 both stop operating, in order to ensure the pressure of the water supply pipe network where the non-negative pressure water supply equipment is located, a high-pressure energy storage cavity 61 is arranged in the flow stabilizing regulator 6, the high-pressure energy storage cavity 61 can be, for example, a bag-type high-pressure energy storage cavity, the bag-type high-pressure energy storage cavity is connected with the water outlet main pipe 12 through a pipeline, and is used for storing high-pressure water during normal operation, when the flow value of the flow meter 3 is smaller than a preset third flow value, the high-pressure energy storage cavity 61 releases the pressure outwards, and the water stored in the flow stabilizing regulator 6 is used for supplying water to the user pipe network and maintaining the pressure of the pipe network.
Referring to fig. 1, in the embodiment of the present invention, the water supply controller 163 may be connected to the control device 17 of the remote control center via a network, and transmit the received signals of the flow meter 3, the inlet water pressure sensor 4, the outlet water pressure sensor 14, the overpressure protector 12, etc. to the control device 17, and the control device 17 controls the water supply controller 163 to operate after performing corresponding processing according to the received signals.
Example two:
based on the same inventive concept, an embodiment of the present invention further provides a control method for a non-negative pressure water supply apparatus, including:
receiving a pressure signal of a water inlet pressure sensor and a flow signal of a flowmeter;
when the pressure signal value of the water inlet pressure sensor is greater than a preset first pressure value and the flow signal value of the flow meter is greater than a preset first flow value, the electric valve and the first water pump are controlled to start, and the opening degree of the electric valve 15 is controlled to be in positive correlation change along with the signal value of the water inlet pressure sensor.
The specific implementation manner of the control method of the non-negative-pressure water supply equipment provided by the embodiment of the invention can refer to the specific description in the first embodiment, and is not described herein again.
Example three:
based on the same inventive concept, embodiments of the present invention also provide a computer-readable storage medium having stored thereon computer instructions, which, when executed by a processor, implement the control method of the non-negative pressure water supply apparatus described above.
Example four:
based on the same inventive concept, the embodiment of the invention further provides a water supply control device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the control method of the non-negative pressure water supply device.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A control system for a non-negative pressure water supply apparatus, comprising: the system comprises a water inlet pressure sensor, an electric valve, a flow meter, a first water pump and a water supply controller;
the water supply controller is respectively connected with the water inlet pressure sensor, the electric valve and the first water pump;
the water supply controller is used for receiving a pressure signal of the water inlet pressure sensor and a flow signal of the flowmeter, and when a pressure signal value of the water inlet pressure sensor is larger than a preset first pressure value and a flow signal value of the flowmeter is larger than a preset first flow value, the water supply controller controls the electric valve to open and control the first water pump to start, and controls the opening degree of the electric valve to be in positive correlation change along with the signal value of the water inlet pressure sensor.
2. The control system of a non-negative pressure water supply apparatus according to claim 1, further comprising a frequency converter connected to the water supply controller and the first water pump, respectively;
the water supply controller is specifically used for controlling the electric valve to achieve the maximum opening degree and controlling the frequency converter to work in a frequency conversion mode when the pressure signal value of the water inlet pressure sensor is larger than a preset first pressure value and the flow signal value of the flow meter is larger than a preset first flow value, so that the water supply pressure value of the first water pump during working reaches a preset second pressure value; the preset first pressure value is smaller than the preset second pressure value.
3. The control system of a non-negative pressure water supply apparatus according to claim 2, wherein the water supply controller is further configured to control the opening degree of the electric valve to change in positive correlation with a change in the pressure signal value of the water inlet pressure sensor when the pressure signal value received from the water inlet pressure sensor is smaller than a preset third pressure value; the preset third pressure value is smaller than the preset first pressure value.
4. The control system of a non-negative pressure water supply apparatus as claimed in claim 2, further comprising: a water outlet pressure sensor;
and the water supply controller is also used for controlling the running frequency of the frequency converter to be in negative correlation change along with the change of the pressure signal of the water outlet pressure sensor when the pressure signal value of the water outlet pressure sensor is received to be larger than a preset second pressure value or the pressure signal value of the water outlet pressure sensor is smaller than the preset second pressure value, so that the water supply pressure value of the first water pump during working is kept at the preset second pressure value.
5. The control system of a non-negative pressure water supply apparatus according to claim 4, wherein the water supply controller is further configured to control the opening degree of the electrically operated valve to change in positive correlation with a change in the pressure signal value of the outlet pressure sensor when receiving that the pressure signal value of the outlet pressure sensor is greater than a preset second pressure value.
6. The control system of a non-negative pressure water supply apparatus as claimed in claim 1, further comprising a second water pump; the water supply controller is further used for controlling the first water pump to stop working and controlling the second water pump to start working when the flow value received from the flowmeter is smaller than a preset second flow value; the rated power of the second water pump is smaller than that of the first water pump; the preset second flow value is smaller than the preset first flow value.
7. The control system of a non-negative pressure water supply apparatus according to claim 6, wherein the water supply controller is further configured to control the second water pump to stop operating when receiving that the flow value of the flow meter is greater than a preset second flow value.
8. The control system for a non-negative pressure water supply apparatus as claimed in claim 7, further comprising a surge regulator, and a high pressure energy storage chamber within the surge regulator;
the water supply controller is also used for controlling the high-pressure energy storage cavity to release pressure outwards when the flow value of the flowmeter is smaller than a preset third flow value; the preset third flow value is smaller than the preset second flow value.
9. A control method of a non-negative pressure water supply apparatus, characterized by comprising:
receiving a pressure signal of a water inlet pressure sensor and a flow signal of a flowmeter;
when the pressure signal value of the water inlet pressure sensor is greater than a preset first pressure value and the flow signal value of the flow meter is greater than a preset first flow value, the electric valve and the first water pump are controlled to start, and the opening degree of the electric valve is controlled to be in positive correlation change along with the signal value of the water inlet pressure sensor.
10. A water supply control apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the control method of the non-negative pressure water supply apparatus of claim 9 when executing the program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010669306.1A CN113293822A (en) | 2020-07-13 | 2020-07-13 | Control system and method of non-negative-pressure water supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010669306.1A CN113293822A (en) | 2020-07-13 | 2020-07-13 | Control system and method of non-negative-pressure water supply equipment |
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| Publication Number | Publication Date |
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| CN113293822A true CN113293822A (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010669306.1A Withdrawn CN113293822A (en) | 2020-07-13 | 2020-07-13 | Control system and method of non-negative-pressure water supply equipment |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0996278A (en) * | 1995-10-02 | 1997-04-08 | Ebara Corp | Variable speed water feeder |
| CN201502074U (en) * | 2009-09-03 | 2010-06-09 | 格兰富水泵(苏州)有限公司 | Digital pipe network superimposed water supply equipment |
| CN104846939A (en) * | 2014-10-22 | 2015-08-19 | 青岛万力科技有限公司 | Full-automatic pipe network pressure-superposed difference compensation secondary water supply device |
| CN105297836A (en) * | 2015-09-28 | 2016-02-03 | 青岛三利中德美水设备有限公司 | Electric control water-supply equipment with no pressure, water supply system and water supply control method |
| CN205242507U (en) * | 2015-11-23 | 2016-05-18 | 上海定一泵业有限公司 | No negative pressure water supply equipment with intelligent control device |
| CN206554167U (en) * | 2017-03-07 | 2017-10-13 | 华中科技大学 | Intelligent frequency-conversion regulator |
-
2020
- 2020-07-13 CN CN202010669306.1A patent/CN113293822A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0996278A (en) * | 1995-10-02 | 1997-04-08 | Ebara Corp | Variable speed water feeder |
| CN201502074U (en) * | 2009-09-03 | 2010-06-09 | 格兰富水泵(苏州)有限公司 | Digital pipe network superimposed water supply equipment |
| CN104846939A (en) * | 2014-10-22 | 2015-08-19 | 青岛万力科技有限公司 | Full-automatic pipe network pressure-superposed difference compensation secondary water supply device |
| CN105297836A (en) * | 2015-09-28 | 2016-02-03 | 青岛三利中德美水设备有限公司 | Electric control water-supply equipment with no pressure, water supply system and water supply control method |
| CN205242507U (en) * | 2015-11-23 | 2016-05-18 | 上海定一泵业有限公司 | No negative pressure water supply equipment with intelligent control device |
| CN206554167U (en) * | 2017-03-07 | 2017-10-13 | 华中科技大学 | Intelligent frequency-conversion regulator |
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Application publication date: 20210824 |